Timing movement



April 1952 A. B. CAMPBELL 2,591,402

TIMING MOVEMENT Filed Oct. 26, 1949 o g "f 1? Q L a 3 Va 5 Q Q? \o q- 10 n 5 i g 3s- E 3 s u W9 an a, as N Is m S. N H g: a 5. r0 g 2 INVENTOR ARTHUR B. CAMPBELL x BY ATTOR N EY Ullllllllllllllllllll l I I ll ll I Ill/Illlllllllllllll [Ullllllllllllllll ll llllll/llllllll Patented Apr. 1, 1952 TIMING MOVEMENT Arthur B. Campbell, La Salle, Ill., assignor to General Time Corporation, New York, N. Y., a

' corporation of Delaware Application October 26, 1949, Serial No. 123,707

2 Claims.

. May 26, 1942.

In many cities it is customary to provide park- 2 posite end of shaft 21. Gear 28 through conventional reduction gearing 29 drives an escapement 30 that controls the rate at which the spring 23 and the gearing connected thereto is allowed to turn.

The indicator shaft II is driven from shaft 21 through a novel sliding transmission so that the operator may choose the speed at-which the indicator shaft will turn. A portion 3| of shaft I I is splined. A collar 32 is frictionally secured to the splined position and two gears 33 and 34 are, in turn, affixed to said collar and spaced apart by the same. Both gears 33 and 34 have the same number of teeth but gear 33 has a ing meters with a higher rate, for example, one larger diameter than 34, as shown in the drawing. hour for five cents in the downtown area and Cooperating with gears 33 and 34 is movable meters with a lower rate of two hours for five gear assembly 35 which comprises gears 36 and cents in outlying areas. Prior to my invention, 31. Gear 36 is slidably mounted on shaft 21. it has been necessary to stock a different model It has a long shank provided with a slot 38. movement for each rate described. Gear 31 having a similar slot 39 in its shank It is an object of my invention to provide a is mounted on the shank of gear 36- A p 49 time movement wherein the operator may, by a driven into shaft 21 through both of slots 38 simple adjustment, vary the indicator speed. and 39 provides a means to rotate both gears 36 A second object of my invention is to provide and 31 by shaft 21 and yet allows said gears to a time movement for a parking meter whereby slide longitudinally on the shaft. a single movement may be used in either of In the lower position of the gear assembly 35 two types of meters having two different time (as shown in Fig. 1) gear 31 meshes with gear indications for the same coin. 34 thereby driving indicator shaft II. In the Still another object is to provide a time moveupper position ear 36 meshes with gear 33 and ment in which the operator has a choice of speeds gears 34 and 3! are disengaged. In the present from the indicator or output shaft, that will be embodiment gear 36 has eight teeth and gear 3'! simple and economical to manufacture and will has sixteen. Since gears 33 and 34 have the same cost little more than a single speed movement. number of teeth, the indicator shaft turns twice Other objects will be apparent to those skilled as fast with gear 31 driving gear 34 as it does in the art from the disclosure of a preferred when gear 36 drives gear 33. embodiment which follows, read in conjunction Means are provided for shifting the gear assemwith the appended drawings in which: bly including a shaft 4| that is slidably mounted Fig. 1 is a schematic view partially in crossin plate 2|. A disc 42 affixed to one end of section showing the time movement; and this shaft is fitted in a groove 43 in the shank Fig. 2 is an elevational view showing the gear of gear 31. In the portion of shaft 4| extendassembly shift lock. ing beyond plate 2| are out two grooves 44. These As shown in Fig. 1, the time movement It! is grooves cooperate with a sliding latch 45 so that mounted between plates 20 and 2|. The shaft the gear assembly 35 may be locked in either of II, hereinafter referred to as the indicator shaft, two positions with either gear 36 or gear 31 in is adapted to be positioned in a parking meter 5 engagement.

in a manner similar to shaft H of the McGay patent identified above.

Shaft H is adapted to support an indicator or pointer |3 shown in said McGay patent. The motive power for the movement is furnished by a mainspring 22 which turns a spring barrel 23 having on its periphery a gear 24. Gear 24 drives gear 25 which is freely rotatable on indicator shaft ll. Gear 25 in turn drives gear also drives gear 28 which is secured to the op- It will be seen, therefore, that the supplying agency need stock only one parking meter movement to service either one hour or two hour meters. In order to set the movement for the correct output speed, the operator loosens the screw holding latch 45 and slides the latch in the upward position so that shaft 4| is free to move axially. He then moves the gear assembly 35 by means of shaft 4| until the proper gears are meshed.

The above description of a preferred embodiment is given as an example. It will be understood that the invention is limited only by the appended claims.

What is claimed is:

1. A timing movement comprising a spring driven barrel, a first shaft adapted to be rotated by said .barrel, a gear affixed to said shaft and connected through gearingito an escapement for controlling the speed of rotation of said shaft, a gear assembly including two gears, one having a different number of teeth from the other, one mounted on the shank of the otheriand each having a slot in its shank, a pin,passing through said slots and into saidfirst'shaft so that said gear assembly is axially slidable on said shaft but rotatable with said shaft, means to slide said gear assembly from a first position to a second position, an indicator shaft mounted parallel to said first shaft, two gears affixed to said indicator shaft and adapted to. mesh with one. of the gears in saidgearassembly when it is' in said second position, and means to shift 1 and locksaid assembly in either "the first or sech ond position.

-2.- In a parking meter: having an elapsed time 4 K indicator a timing movement comprising a mainspring, reduction gearing driven by said mainspring, an escapement driven by said gearing and in turn controlling the speed at which said gearing is driven, means to connect said indicator to said gearing including an indicator shaft, two

,gears having different diameters but the same number of teethsecured tozsaid shaft, and spaced axially from each other and a slidable gear assembly cooperating with said gears including two gears having different diameters and different "numbers of teeth, one gear adapted to be engaged with one of the indicator shaft gears and one with' the other of the indicator shaft gears "wherebysaid indicator may be driven at either one of two speeds.

ARTHUR B. CAMPBELL.

REFERENCES CITED The following references are of recordin. the

" file"'of this "patent:

UNITED STATES "PATENTS Number Name Date 1,973,275 Babson Sept. 11, '1934 2,284,221 McGay May 26, 1942 

